Lock.



N. T. FOSTER & B. M. DRE'SKA.

LOCK.

APPLICATION FILED FEB. 11, 1909.

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LOOK.

APPLIOATION FILED P131341, 1909.

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NOAH T. FOSTER, AND BERTHA M. DRE$KA, OF CHESTER, ILLINOIS.

LOCK.

Specification of Letters Patent.

Application filed February 11, 1909. Serial No. 477,340.

To all whom it may concern:

Be it known that we, NOAH T. Fos'rnn and BERTHA M. DRESKA, a citizen ofthe United States, residing at Chester, in the county of Randolph andState of Illinois, have invented certain new and useful Improvements inLocks, of which the following is a specifica-' tion.

This invention relates to locks,'and has special reference to that classof locks which are known as permutation locks.

An object of the invention is to produce a lock of this nature which maybe employedas a padlock and in the use of which it is not necessary toemploy a detachable key.

Another object of the invention is the provision of a device of thischaracter which may be readily carried and which will be effective inuse and which will be adaptable to all uses where detachable lockingmeans are employed.

The invention has for a further object the provision of a lock of thisnature which comprises but few parts, is simple in construction andoperation and one which may be economically manufactured.

Other objects and advantages will be ap parent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimswithout departing from the spirit of the invention.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation of the complete lock, Fig. 2 is a top planview of the same, Fig. 3 is a vertical longitudinal section through thelock, Fig. 4 is a side elevation of the lock, the casing being broken.Fig. 5 is a sectional view at right angles to Fig. 3.

Referring to the drawings, 10 designates a cylinder which is providedwithv an integrally-formed head 11 and which is open at the lowerextremity. The top 11 of the cylinder is diametrically apertured nearthe outer edge of the same for the reception of a shackle 12 which isdetachably secured therein. The top 11 is also centrally apertured toreceive the upper extremity of a pintle 13 which is secured rigidly insuch position by means of a set screw 14 extended centrally through thetop 11 from the side of the cylinder 10. The pintle 13 is provided witha flange 15 adjacent the inner face of the cover 11 for the purpose offorming a shoulder to provide a reinforcement for positioning the pintle13 within the cylinder 10. Rotatably disposed upon the pintle 13 are aplurality of tumblers 16 which are provided with-integrally formedcollars '17 for the purpose of separating the same at a predetermineddistance apart and which are frictionally held in position by means ofsprings 18 which are embedded in apertures laterally formed in thepintle 13 and distanced so as to engage the inner faces of the collars17. The tumblers 16 are provided with studs upon their inner oppositefaces as shown at 19 which are adapted for engagement with each otherupon the rotation of the tumblers 16.

In the lower end of the cylinder 10 a disk 20 is positioned which isprovided with a flanged collar 21 which carries an upwardly extendedstud 22 for engagement with the depended stud 19 carried by theadjoining tumbler 16 for the purpose of actuating the tumblers 16, thedisk 20 being held in such position by the employment of set screws 23which are secured through threaded apertures formed in the side of thecylinder 10 to admit of the inner extremities of the set screws engagingwith the flanged collar 21 which construction prevents the withdrawal ofthe disk 20. The shackle 12 is provided with serrated-portions at theopposite ends of the same through which are passed the tumblers 16. Thetumblers 16 are provided with oppositely disposed slots 24: formed inthe edges of the same through which are adapted to pass the serratedends of the shackle 12 upon the registration of the slots 24. For thepurpose of reinforcing the ends of the shackle 12, especially when astrain is exerted upon the same by the rotation of the tumblers 16, thecylinder 10 is provided with longitudinally formed grooves 25 upon theopposite inner faces thereof which are of semicircular cross section,and into which are positioned the ends of the shackle 12 when insertedin the apertures formed through the cover 11. The disk 20 is preferablyprovided with a serrated perlphery for engagement by the hand of theoperator for the purpose of admitting of the frictional engagement ofthe same during the operation of the tumblers 16. I The periphery of thedisk 20 is also preferably marked so as to designate the number of turnsand half turns required to turn'the tumblers to Patented Nov. 30, 1909.

cause the registration of the slots 24 formed in the edges thereof.

The operation of the device is as follows: When the disk 20 is rotatedthe stud 22 Which is carried by the same is caused to strike against theadjacent stud 19 and to carry the lowermost tumbler 16 about with thesame. The studs 19 disposed upon the remaining tumblers are caused tostrike one another during this operation and as the tumblers are rotatedthe slots 24 formed therethrough are caused to register and to admit ofthe withdrawal of the shackle 12 upwardly through the same. To lock theshackle in position the tumblers 16 are so positioned as to register theslots 24 when the ends of the shackle 12 are inserted through the cover11 and through the slots 24. The disk 20 is then rotated in an op positedirection when the tumblers 16 are consecutively moved to cause theslots 24 to be turned out of alinement and to thereby engage the outeredges of the tumblers 16 through the serrations formed in the ends ofthe shackle 12.

What is claimed is 1. In a device of the class described, thecombination of a cylinder, a cover integrally formed therewith, a pintledepended from said cover centrally in the said cylinder, a plurality oftumblers rotatably disposed upon said pintle, studs projected from saidtumblers for engagement with one another, a disk rotatably mounted inthe lower end of said Gylinder, a stud carried by said disk forengagement with the stud of the adjacent tumbler, springs embedded inthe side of the said pintle for engagement with the tumblers tofrictionally retain the tumblers in position, and a shackle havingserrated ends for engagement through the cover and through the slotsformed in the edges of the tumblers.

2. A device of the class described comprising a cylinder, a pintlecentrally disposed in said cylinder, a plurality of tumblers mountedabout said pintle, springs carried by said pintle for engagement withsaid tumblers, a disk mounted in the lower end of said cylinder, studscarried by said tumblers and said disk for imparting rotation betweenthe same and a shackle having serrated extremities inserted in saidcylinder for engagement with said tumblers.

In testimony whereof we allix our signatures, in presence of twowitnesses.

NOAH T. FOSTER. BERTHA M. DRESKA.

Vitnesses J. FRED GILSTER, RALPH E. SPRIGG.

